英語翻譯：

相關詞條：

例句：

1. 毛毛蟲必須經(jīng)過繭的階段才能變成蝴蝶。
   A caterpillar must pass through the cocoon stage to become a butterfly.
2. 冬天多數(shù)蟲子作繭。
   Most worms cocoon in winter.
3. 孩子們撕開蠶繭看看里面有沒有蛹。
   The children tore the cocoon open to see if there was a pupa.
4. 蠶繭是由昆蟲制造的一種由絲組成的外包層。
   A cocoon is a kind of silk covering made by an insect.